How to set alias path for files in monaco editor?

monaco-editor version: 0.2.0
Browser: chrome
OS: mac
Playground code that reproduces the issue:

monaco.languages.typescript.javascriptDefaults.setCompilerOptions({
    allowNonTsExtensions: true,
    allowJs: true,
    target: 99,
    paths: {
        "@/*": ["./"]
    },
    baseUrl: './',
})


const fooModel = monaco.editor.createModel(
    `export const a = {name: 'abc'}`,
    'javascript',
    monaco.Uri.parse('file:///foo.js')
);

const mainModel = monaco.editor.createModel(
    `import {a}  from '@/foo';\n`,
    'javascript',
    monaco.Uri.parse('file:///main.js')
);

monaco.editor.create(document.getElementById('container'), {model:mainModel});

import {a} from '@/foo' no syntax tips for a

Expect
a has IntelliSense

Start by running the supplied Playground code with Monaco Editor 0.2.0 and inspect how the JavaScript defaults handle the paths and baseUrl compiler options. Trace module resolution for the two created models; done means the import from '@/foo' provides IntelliSense for a.